Control means for phonographs



Oct. 29, 1929. N. c. DURAND 1,733,951

CONTROL MEANS FOR PHONOGRAPHS Filed June 22, 1925 2 Sheets-Sheet 1INVENTOR Mm TTORNEY Patented Oct. 29, 1929 UNITED STATES, PATENT OFFICE]NELSON C. DURAND, OF NEWARK, NEW JERSEY, ASSIGNOR TO THOMAS A. EDISONINCORPORATED, OF WEST ORANGE, NEW JERSEY, A CORPORATION OF NEW JERSEYCONTROL MEANS FOR PHONOGRAZPHS Application filed June 22, 1925. SerialNo. 88,613.

My invention relates to control means for phonographs and moreparticularly to an improved constructionand arrangement where- Ithereof, is combined or associated in a novel manner with a typewriterdesigned to be used in transcribing matter reproduced by suchphonograph.

In, transcribing matter recorded on a phonograph cylinder or tablet itis customary for the operator of the typewriter to start the mandrel orrecord tablet support of the phonograph, with the reproducing mechanismof the latter in operative position, to listen to as much of thereproduction as she can conveniently carry in her mind, and to then stopthe mandrel or support and transcribe on the typewriter the mattershehas just listened to. These operations are repeated over and over andnecessitate frequent starting and stopping of the mandrel or recordtablet support of the phonograph. Occasionally, the operator of thetypewriter desires to have the last fewwords of the reproduction of thesection of the record just listened to repeated, and this necessitatesthe stepping back of the reproducing mechanism of the phono graph aslight distance towards the beginning of the record, or what is known asthe backspacing of the reproducing mechanism, so that such words will beagain reproduced. The start and stop and backspacing operations justdescribed are at present controlled in various ways, all of which areopen to certain objections as will be hereinafter set forth.

It is usual to control the start and stop oper ations of a transcribingphonograph either pneumatically by means comprising a pedal orfoot-operated device disposed on the floor beneath, the typewriter, orelectrically by means including a switch disposed near the typewriteradjacent one end thereof, generally adjacent the left-hand end thereof.Many transcribers object to thepneumatic control means described becausethe feet are not left.

free, the pedal or foot-operated device is likelvto be moved out ofproper position on the 'floor and also must be repositioned each timethe transcriber changes her position, and it is necessary to maintain afatiguing pressure upon the pedal or foot-operated device throughouteach period of rotation of the mandrel. The electrical control meanswith the swltch disposed adjacent one end of the typewriter is also opento improvement, for

some transcribers employing the touch system find the manipulation ofthis switch somewhat distracting owing to the factthat it necessitatesthe removal of the hand from proper position over the keys of thetypewriter.

The backspacing operation referred to is usually efiected eithermechanically or electrically. Where this operation is effectedmechanically it is customary to employ means comprising a manuallyoperable key or lever mounted directly on the phonograph. As thephonograph is necessarily some distance from the typewriter, it isobvious that the actuation of the manually operable key or lever is verydistracting to an operator, especially to one employing the touchsystem. \Vhere the backspacing operation is electrically-controlled, aswitch is provided adjacent one end of the typewriter, generallyadjacent the right-hand end thereof, which must be actuated by theoperator when it is desired to hack-space. The manipulation of thisswitch located as described, is found distracting by some touchoperators for the reason indicated above in connection with the switchof the electrical control start and stop means.

The principal object of my invention is to provide an improvedarrangement for controlling either the start and stop operations or thebackspacing operations of a transcribing phonograph, or both the startand stop and backspacing operations, which will not be open totheobjections above noted and which preferably comprises a deviceadapted to be readily actuated by a very light touch or pressure of thethumb or Hand of the transcriber without necessitating the removal ofthe fingers from their proper touch operating .positions relative to thekeys of the typewriter.

Another object of my invention is to provide in an arrangement of thischaracter an improved manually operable device for association withtypewriters, which is of simple construction, which preferably is soconstructed that it may be quickly and readily disposed in properposition relative to a typewriter and removed from such position, andwhich is adapted to be used with various makes and models of typewritersand can be readily removed from one typewriter and applied to another ofa different make or model.

Other objects and features of my inven- 1 tion will be hereinafter morespecifically described and claimed.

In order that my invention may be more clearly understood, attention isdirected to the drawings accompanying and forming a part of thisspecification, and in which:

Figure 1 is a somewhat diagrammatic view showing a typewriter, aphonograph and control means for the phonograph associated with thetypewriter and connected with the phonograph in accordance with myinvention, both the typewriter and phonograph be ing shown partly brokenaway;

Fig. 2 is a wiring diagram of the phonograph control means shown in Fig.1;

Figs. 3 and 4 are enlarged views in elevation of the opposite ends,respectively, of

the electromagnetic device comprising a part of the means, shown 1n Fig.1, for controlling the starting and stopping of the phonograph mandrel;

Fig. 5 is an enlarged plan view of the combined start and stop andrepeat switch device which is shown in Fig. 1 associated with the frontbar of the typewriter;

Fig. 6 is a view in front elevation of the switch device shown in Fig.5, the front wall of the casing of said device being removed;

Fig. 7 is a view in end elevation, partly in section and partly brokenaway, of the switch device shown in Fig. 5; and

Figs. 8, 9 and 10 are enlarged detailed views of the start and stopcontrol switch.

Referring to the drawing and especially to Fig. 1, reference'character Pdesignates a reproducing phonograph of the business or commercial type,T a typewriter and S a switch device associated with the typewriter inaccordance with my invention for controlling a-certain operation orcertain operations of the phonograph, preferably the starting andstopping of the mandrel thereof and the backspacing of the reproducercarriage.

Reference character 1 represents the cabinet of the phonograph and 2 themandrel carrying the cylindrical sound record and rotatably mounted in asuitable bearing provided in a support or standard 4 on the cabinet 1.The reproducer carriage or arm C of the phonograph is mounted on a backrod 5 and is movable along the same to produce a relative feedingmovement between the carriage and the record on the mandrel 2, thisfeeding movement being effected 1nthe usual way by means comprising arotating feeding screw and a cooperating feed nut (not shown). A clutchmember 6 is splined on the shaft of the mandrel 2 and is adapted tocooperate with an opposed clutch member 7 fixed to a pulley 8 which isrotatably mounted on a stub shaft 9 aligned with the shaft of themandrel 2 and fixed in a support or standard 10 on the cabinet 1. A belt11 passes over the pulley 8 and serves to drive the latter from asuitable motor (not shown) disposed within the cabinet 1. The clutchmember 6 is movable into and out of engagement with the clutch member 7by means of a member 12 which is mounted for pivotal or rocking movementabout a vertical axis on the cabinet 1 and the upper end portion ofwhich is provided with the usual rearwardly extending fork or yoke (notshown) the arms of which engage a circumferential groove in the member6. At its lower end below the top of the cabinet 1 the member 12 isprovided with an arm 13 which, referring to Fig. 1. extends rearwardly;and to the rearward end of this arm is pivoted one end of a link 14having its other end pivotally connected to an armature of theelectromagnetic means for controlling the movement of the clutch member6. This electro magnetic means is preferably of the constructiondescribed and claimed in Patent No. 15380386, granted June 7, 1921, onan application of S. G. Langley, and comprises two pairs ofelectro-magnets having coils 15, 15 and 16, 16 secured to a supportingplate 17 which is fastened to the under side of the top of the cabinet1, and two U-shaped armatures 18 and 19 for the respective pairs ofcoils which are pivoted at their ends to the plate 17 on axes 20 andextend along the sides of the respective coils and over the free endsthereof. Each of the armatures 18 and 19 is mounted so that the basethereof will move in a direction transversely of the lower or free endsof the respective pair: of coils. The link 14; is pivotally connected toone of these armatures and, as shown, to the armature 18 At one side ofthe coils and armatures is a vertical plate 21 secured to the supportingplate 17 and formed of insulating material. A vertically disposed arm 22mounted independently of and interposed be tween the U-shaped armatures1S and 19 so as to be actuated thereby, is pivoted at its upper end tothe plate 21 on an axis parallel with the axes 20, said arm beingprovided with a pivot pin 23 extending through the plate. 21 to theopposite side thereof. The

'arm 22 is provided with suitable shock and noise absorbing material 24,preferably felt, against which the armatures strike when actuated. Theplate 21 is provided at one edge with spaced lugs to which arerespectively secured contacts 27 and 28 having contact surfaces arrangedin a plane substantially cuits of the pairs of coils are controlled.

As more fully described-in Patent 1,380,486

mentioned above, the clutch member 6 is j moved in one direction uponmovement of the armature 18 and 19 When one pair of coils 1s energizedand in the opposite direction when the other pair of coils is energized.The movement of these armatures, through the medium of arm 22, alsoautomatically controls the switch contact arm 32 to open the circuitthrough one set of coils and to place the circuit of the other set ofcoils 1n c0nd1- tion to be closed upon each actuation of the start andstop control switch compris ng a part of the switch device S, which willbe hereinafter more fully described. At one end the armatures 18 and 19are connected by a coiled spring 34 which is arranged to be tensioned bythe movement of either armature to attracted position. This sprlngcooperates with inwardly extending members 35 and 36 provided upon thearmatures and which engage each other and are adapted to prevent theactuation of one armature under the tension of spring 34 until the otherarmature reaches attracted position. Each of the members 35 and 36 has,referring to Fig. 3, a curved upper edge concentric with the plvot ofits armature and adapted to be engaged by a curved end of the member ofthe other armature. It will be apparent that when one armature is movedto attracted positlon its said concentric edge supports and holds theother armature and releases it only when such movement is completed, themembers then engaging in the reverse order so that when the otherarmature'is attracted the first armature is supported and held untilcompletion of the movement of the latter armature.

The backspacing of the reproducer carriage C may be effected in variousways but is preferably effected by rocklngthe back rod 5 by means of aconstruction similar to that disclosed in Patent 1,275,257. granted Aug.

13, 1918, on an application of N. H. Holland, comprising the pivotedarmature 40 of an electro-magnet 39 and an arm 41 secured to the backrod 5 and having a pin and slot connection with the armature 40 so as toeffect rocking movement of said back rod when said armature is attractedupon energizing of the magnet. The circuit of the electrosmagnet 39 iscontrolled by another switch comprising a part of the switch device Sassociated with the typewriter T.- v

The switch device S comprises a hollow casing 45 rectangular in shapeand having two front sections 46 and 47, preferably of different height,and a rear section 48 of reduced height, less than either of thesections 46 and 47 which is adapted to take beneath the under-cutportion ofthe front bari B of the typewriter T so that the switch devicemay be secured. in proper position adjacent said front bar B andintermediate the ends thereof in a manner to be hereinafter described. A

The start and stop switch which is preferably of the commutator type andhas most of its parts disposed within the higher front section 46 of thecasing 45, is the subject matter of my application, Serial No. 395,535,entitled Switch devices, and filed September 27, 1929 as a division ofthe present application. This start and stop switch comprises acommutator cylinder or drum 50 formed of suitable non-conductivematerial, secured to a sleeve 51 which is rotatably mounted on ahorizontal rod 52 supported in the opposite end walls of the section 46and held'in fixed position by a set screw 53. A spacing sleeve 54 issecured to the sleeve 52 by a set screw,

and secured to one end of this sleeve isa ratchet comprising a part ofthe means for .actuating the drum 50. Embedded in the body of the drum50 and flush with the surface of the drum are a plurality of bars orstrips 55 of conductive material, said bars extending longitudinally ofthe drum and parallel to the axis thereof and being equispacedcircumferentially of the drum. While the drum may be provided with anynumber of these equi-spaced conducting bars 55, 11 have shown the sameas provided with five such bars.

Within the casing of the switch device and extending at right angles tothe axis of the Reference characters 56, 57 and i 58 representstationary contact arms disposed jacent the bottom thereof and beneaththe commutator drum, such arms being bent so that the rear portionsthereof will be adjacent the-top wall of the rear section 48 of theeasing. A member 59 formed of insulating material and extendinglengthwise of the rear casing section 48 is secured against theunderside of the top of said rear section by screws 60, and the contactarms 56, 57 and 58 are fixed in spaced relation to said member 59 byscrews 60. Two contacts 61 and 62 are mounted on the contact arm 56 inspaced relation so as to engage the commutator-drum 50 adjacent theleft-hand end thereof at diametrically opposed points; and similarcontact arms 63 and 64 are respectively'mounted on the forward endportion of the contact arm 57 and a lateral extension 58' of the contheform of a flat, substantially rectangular, member formed of suitableconductive material such as'copper and has a reduced lower end portion65 loosely disposed within an opening 66 provided therefor in thecontact 7 arm on which it is mounted, whereby the conrespective cont-actarm.

tact is adapted for pivotal movement about its lower reduced end towardand from the commutator drum-{and each of said contacts is yieldinglyand firmly held in wiping engagement with the commutator drum 50 bymeans of a tension spring 67 having its ends respectively connected tothe contact and the Conductors 70,. 71 and 72 are respectively suitablysecured to the rear ends of the contact arms 56, 57 and 58 and .extendfrom the casing through a suitable outlet 73 provided in the rear sidethereof, said conductors being disposed exteriorly of the casing withina cable 74. The commutator drum is adapted to be turned about its axisby a pawl and ratchet mechanism the operation of which is controlled bya large fiat vane or flap 75 pivotally mounted adjacent its rear edge ona horizontal rod 76 supported in spaced rectangular lugs 77, 78 and 79extending upwardly from the top of the front section'46 of casing 45adjacent therear edge of said section. The rod 76 is secured in fixedposition by a set screw and the vane or flap 75 is mounted on said rodby means of downwardly extending lugs formed I at the ends of the vaneand through which the rod 76 extends, the lugs on the vane 75 coact ingwith the lugs 77 and 79 to prevent substantial movement of the vanelongitudinally of the rod 76. Also pivotally mounted on the rod 76between the lugs 77 and 78 and lying beneath the vane 75 is a member 80which has the shape of an inverted U in transverse crosssection andwhich is movable about its pivot towards and away from the axis of thecommutator drum 50 through an opening 81 provided in the top wall of thefront section 46. A pawl 82 is pivotally mounted on the memher 80adjacent the forward end thereof by means of a pin 82' so as to be incooperative relation with the ratchet 83 secured to the inner end of thesleeve 54 which is fixed to the sleeve 51 of the commutator drum 50. Theends of a coiled spring 84 which is mounted on the member 80,respectively coact with the upper end of the pawl 82 and witha pin 85carried by 82 in coasting relation with the teeth of the ratchet 83. Acoiled spring 86 disposed on v thereby the flap or vane 75 in theiruppermost or raised positions, as shown in Fig. 8;

the upward movement of the vane 75 and the member 80 under the influenceof said spring 86 being limited by engagement of the rear the member 80so that said spring yieldin'gly holds the lower end of said pawl edge ofthe vane with the top surfaces of the lugs 77, 78 and 79 rearwardlj ofthe pivot rod 76. The ratchet 83 is preferably provided with twice asmany teeth as there are conductor bars 55 on the commutator drum 50, thearrangement being such that each time the vane or flap 75 is depressed,the pawl 82 will advance the ratchet 83 the distance of one tooth andthereby move the commutator drum 50 about its axis a distance equal tohalf the distance between two adjacent conductors 55. The arrangement ofthe commutator drum 50 and the wiping contacts 61, 62, 63 and 64coacting therewith is such that each time the commutator drum is movedone step by means of the pawl and ratchet mechanism, either the frontpair of contacts 61 and 64 will be in engagement with one of theconductor bars 55 and the rear pair of contacts 62 and 63 will engage asurface portion of the drum between two adjacent conductors or. viceversa, the rear contacts 62 and 63 will be in engagementwith one of ithe conductors 55 and the fron'tpair of contacts 61 and 64 will be inengagement with a surface portion of the drum intermediate two adjacentconductors 55. The pin 85 is secured to the member 80 in such a positionthat when the vane or flap 75 is depressed to the dotted-line positionshown in Fig. 8, said pin will engage between two adjacent teeth of theratchet 83 and act to limit the forward movement of said ratchet andthereby the commutator drum 50 to a distance corresponding to thedistance between two adjacent teeth of the ratchet no matter how quicklythe vane or flap 75 is depressed.

The backspacing switch, most of the parts of which are disposed withinthe front casing section 47, comprises two spaced contact arms 88 and 89extending transversely of the casing and preferably substantiallyparallel to the contact arms 56, 57 and 58 of the start and stop switch.The forward end portions of the contact arms 88 and 89 are disposedwithin the front casing section 47 adjacent the bottom thereof, and saidarms are bent so that the rear end portions thereof will be adjacent thetop of the rear casing section 48. The contact arms 88 and 89 aresecured adjacent their rear ends to the insulating member 59 by screws90. Two conductors. 91 and 92 are respectively suitably secured to therear ends of said contact arms and extend outwardly from the casing ofthe switch device through the outlet 73, said conductors being disposedexteriorly of the casing 45, within a cable 93, A pivoted vane orfiap95, similar to the vane7 5, is arranged to coact with plunger meansto control the opening and closing of the backspacing switch. The vane95 is pivotally mounted adjacent its rear edge on a rod 96 which issections 46 and 47, and a rectangular lug 98 extending upwardly from thetop of the section 47, said rod being secured in fixed position by a setscrew. The vane 95 is pivotally mounted on said rod 96 by means ofdownwardly extending lugs formed at the ends of said vane and throughwhich the rod 96 extends, said lugs coacting with the shouldered portion97 of the casing and an extension 98' of the lug 98 to prevent movementof the vane 95 longitudinally of the rod. A plunger 99 extends throughan opening in the top of the casing section 47, the upper end of thisplunger preferably being rounded and engaging the under side of the vane95 while the lower end of said plunger has a contact 100, preferably inthe form of a cylinder of copper or other conductive material, mountedthereon. The said cylindrical contact 100 is preferably freely rotatableon the lower end of the plunger 99 and is suitably insulated therefrom.The plunger 99 and'contact 100,

and thereby the vane 95, are biased to their uppermost circuit-openingpositions, as shown in the Figures 6 and 7, by means of a coiled spring101 mounted on a screw 102 and having one end coacting with the casingand the Other end-thereof extending through an opening 103, in theplunger 99. Upward movement of the vane 95 and thereby of the plunger 99and contact 100, is limited by engagement of the rear edge of the vane95 with the upper fiat surface of the lug 98 rearwardly of the rod 96.

To guard against short-circuiting of the start and stop and backspacingswitches. and especially against the short-circuitinv of one of theseswitches in case any part of the other switch disposed within the casing45 becomes loose or is broken, the inner sides of the bottom, front andrear walls of casing 45 and of the top wall of casing section 48 arelined with suitable insulation R and partitions L p of insulatingmaterial are disposed within the front casing sections 46 and 47 so asto separate moving parts of each switch from conductive parts of thecasing and of the other switch.

The reduced rear section 48 of the casing 45 of the switch device S isprovided at its ends with outstanding lugs 105, and pivotally mounted onsaid lugs as by meansof screws L 106 are two arms 107 having forwardlyextending right-angular end portions 108. Each of the portions 108 ofthe arms 107 has an inclined edge 108' andeach of said portions hassecured thereto at its forward free end av cylindrical handle 109.Strong coiled springs 110 mounted on the screws 106 between'the heads ofthe latter and the lugs 105 constantly tend to hold the arms 107 in avertical position against the ends of the casing 45, as shown in Fig. 6,one end portion of each of the springs 110 bearing against and embracmgthe outer edge portion of the respective arm 107 and the other endportion thereof being deflected laterally and engaged with one of acircular series of spaced recesses 111 formed in the respective lug 105.The inner lateral deflected end portion of each of the springs 110 maybe engaged with any one of the respective series of recesses 111 tothereby ad just the effective tension of the spring as desired.

As hereinbefore indicated, the switch device S is associated with thetypewriter T substantially in the position shown in Fig. 1,

that is, in a position adjacent thefront ba'r B of the typewriterintermediate the ends thereof, and preferably substantially midwaybetween the ends thereof. with the reduced casing section 48 disposedand held between said front bar and the desk or other support E for thetypewriter and with the actuating vanes or flaps 75 and 95 of the startand stop and backspacing switches adjacent said front bar. The switchdevice S may be readily so located by pressing each of the arms 107downwardly about its pivot against the action of spring 110 to aposition corresponding to the dotted-line position 107 in Fig. 6, movingthe switch device to a position on the support 1* in which the rearcasing section 48 and the angular end portions 108 of the arms 107 arebeneath the front bar B and then releasing said arms. The springs 110then act to hold the inclined edges 108 of the angular end portions ofthe arms 107 firmly against the under side of the front bar B of thetypewriter and the casing 45 firmly against the support E. The switchdevice will thus be frictionally held in proper position with respect tothe typewriter, and it is apparent that the same may be readily disposedin and removed from such position. The casing sections 46 and 47 arepreferably of such height that the actuating flaps pr vanes 75 and 95will, when the device S is disposed in the position described, bepositioned adjacent the top of the front bar B so asto enable the sameto be'readily actuable by the thumbs, wrists than the vane 95 Thedisposition of these vanes at different heights not only enablestheoperator to more readily differentiate between them but renders lesslikely the accidental actuation of either vane upon the actuation of theother. prises both'a start and stop and a backspac- Where the switchdevice S coming switch with two pivoted actuating vanes or flaps, asshown, it is intended that the vane 75 for controlling the start andstop switch be actuated by the thumb, wrist or heel of the left hand ofthe operator and that the vane 95 of the backspacing switch be operatedby the thumb, wrist or heel of the right hand, while the fingers of bothhands are maintained in proper touch-operating position over the keys K.The construction is preferably such that a very light pressure quicklyapplied andfremoved, similar to but preferably somewhat less than thepressure or touch used in actuating the keys of the typewriter, Wlllsuflice to fully depress either of the switch actuating vanes 75 and 95.f

\Vhile the switch device S may be associated with nearly every make oftypewriter in the manner above described when the typewriter issupported on a table or desk in the usual way, it is sometimes necessarybecause of the peculiar construction of certain makes of typewriters, orbecause the typewriter is mounted on a special form of support, eitherto afiix the switch device to the desk or other support for thetypewriter or to clamp the device to the frame of the typewriter. Thecasing 45 is accordingly provided with two apertured lugs 112 to enablethe switch device to be screwed or bolted to the desk or other supportfor the typewriter. WVhere it is necessary to clamp-the switch device tothe frame of a typewriter, any suitable form of clamping means may beemployed.

Reference characters 115 and 116 represent the conductors of a lineleading from a suitable source of current supply (not shown) forfurnishing current to the start and stop actuating'means and switch andalso to the backspacing actuating means and switch. The line conductor115 is directly connected to the switch contact arm 32 which coacts withthe spaced stationary contacts 27 and 28 of the start and stop actuatingmeans. The contact 27 is connected by a conductor 117 to the coils 15,15 of one pair of magnets of the start. and stop actuating means andsaid coils are connected by a conductor 118 and through a suitableresistance to the conductor 71 which leads from the contact arm 63 ofthe start and stop switch. The other contact 28 with which the arm 32izoacts is connected by a conductor 119 to the coils 16, 16 of the otherpair of electro-magnets of the start and stop actuating means and saidcoils areconnected by a conductor 120 and through a suitable resistanceto the conductor 72 which leads from the contact 64 of the start andstop switch. Line conductor 116 is directly connected to'the conductorwhich leads from the contacts 61 and 62 of the start and stop switch.

The line conductor 115 is also connected by a conductor 122 to one endof the coil of the v e e ctro-magnet 39 of the backspacing actuat ingmeans, the other end of this coil being directly connected to theconductor 92 which leads from the contact 89 of the backspacing switch;while the line conductor 116 is direct- -ly connected with the'conductor91 which scribed is as follows: whenever the operator.

desires. to actuate either the start and stop switch to effect thestarting or stopping of the mandrel of the phonograph P, or the backspacing switch to backspace the reproducer carriage C of the phonographso that the section of the record 3 last reproduced will be repeated,she merely applies a light pressure to the proper vane or 95 and quicklyremoves such pressure, the construction and arrangement, as explainedabove, being such as to enable the operator to thus actuate the propervane or flap with the thumb, wrist or heel of one hand or the otherwithout removing her fingers from proper touch-operating position overthe keys of the typewriter. It will be apparent that the actuating ofthe start and of the typewriter and is not fatiguing. Upon eachactuation of the vane 75 of the start and stop switch the commutatordrum 50 is moved about its axis by the pawl and ratchet mechanism 82 and83 a distance equal to half the distance between two of the adjacentconductor strips 55 thereof, the arrangement being such that upon onesuchactuation of the vane the drum is moved to a position in which oneof the conducting strips 55 engages the front pair of contacts 61 and 61 and a non-conductive surface portion of the drum engages the back pairof contacts 62 and 63 and upon the next actuation of the vane the drumis moved to a posit-ion in which one of the conductive strips55 engagesthe rear pair of contacts 62 and 63 and a non-conductive surface portionof the drum engages the front pair of contacts 61 and 64.

As shown in Fig. 1, the clutch member 6 is disengaged from the clutchmember'7 and accordingly the mandrel 2 and record 3 are at rest. In thisposition of the clutch member 6 the armature 19 will be in its attractedposition with the base thereof directly opposite the lower ends of thecoils 16, 16, the armature 18 will be in its unattracted position to theright of the position'shown in Fig. 2, the pivoted contact arm 32 willbe in engagement with the stationary contact 27 in a position corresonding to the dotted-line position thereo in Fig. 2, the front pair ofcontacts 61 and 64 of the start and stop switch will be in engagementwith one of the conducting stri s 55 of the commutator drum 50, and theack pair of contacts 62 and 63 will be in engagement with anon-conductive port-ion of the surface of said drum. To now throw theclutch member 6 into engagement with the member 7 and start the mandrel2 and record 3, it is merely necessary to actuate the vane 75. Upon suchactuation of this vane the drum 50 will be turned to a position in whichone of its conductive strips 55 engages the back pair of contacts 62 and63 and a non-conductive surface portion thereof engages the front pairof contacts 61 and'64, as shown in Fig. 2. The movement of the drum 50to this position effects the closing of the circuit of the coils 15, 15of the start and stop actuating means through the following path: fromthe line conductor 115, through the contact arm 32, contact 27,conductor 117, coils 15, 15 and conductors 118 and 71 to the contact 63of the start and stop switch, then through the conductive strip 55 ofthe commutator drum engaging the contact 63, contact 62, contact arm 56and conductor 70, to

the other line conductor 116. The coils 15, 15 now being energizedattract armature 18 and move the same from the position shown in Fig. 1to that shown in Fig. 2, and such movement of this armature through themedium of members 14, 13 and 12, moves clutch member 6 into engagementwith clutch member 7 and thereby effects the starting of the mandrel 2and record 3. Just as it completes its movement to attracted positionarmature 18 through the medium of spring 34, moves ar-' mature 19 fromits attracted position to the position shown in Fig. 2, the latterarmature by means of arm 22 and pivot pin 23 thereupon moving thecontact arm 32 from engagement with contact 27 into engagement withcontact 28 thus breaking the circuit of coils 15, 15 and placing saidarm 32 in such position that the circuit of coils 16, 16 is adapted tobe closed upon a subsequent actuation of the vane 75. Upon suchsubsequent actuation of said vane 75, the commutator drum 50 is moved toa position in which one of its conductive strips 55 engages the frontcontacts 61 and 64 and a non-conductive surface portion thereof engagesthe rear contacts 62 and 63, whereupon the circuit of coils 16, 16 willbe closed over the following path: from line conductor 115 throughcontact arm 32, contact 28, conductor 119, coils 16, 16, and conductors120 and 72, to the contact 64 of the start and stop switch, then throughthe conductive strip 55 of the commutator drum engaging the contact 64,contact 61 and conductor to the line conductor 116. The coils 16, 16 nowbeing energized, the armature 19 is moved to attracted position, thatis, from the position shown in Fig. 2 to a position corresponding tothat shown in Fig. 1. Just as it completes its movement to attractedposition,

armature 19, through the medium of spring 34, moves armature 18 fromit'sattracted position to the position shown in Fig.1, the latterarmature by means of members 14, 13 and 12 thereupon disengaging theclutch member 6 to effect the stopping of the mandrel 2and record 3. Thearmature 18 in such movement thereof from attracted position and throughthe medium of arm 22 and pivot pin 23, also moves contact arm 32 fromengagement with contact 28 into engagement with contact 27, thus openingthe circuit of coils 16, 16 and placing said arm 32 in such positionthat the circuit of coils 15, 15 is adapted to be closed, as describedabove, upon the next actuation of the vane 75.

When it is desired to backspace the reproducer carriage C of thephonograph, the operator merely applies a light pressure of smallduration to the vane or flap 95 of the backspacing switch. Suchactuation of the vane 95 depresses plunger 99 against the action ofspring 101 and brings the contact 100 into engagement with the contacts88 and 89 so as to close the circuit of the coil of the electro-magnet39 over the following path: from the line conductor 115, throughconductor 122, the coil of magnet 39 and conductor 92, to the contact 89of the backspacing switch, then through the contacts 100 and 88 andconductor 91 to the other line conductor 116. The coil of theelectro-magnet 39 now being energized the armature 40 is moved toattracted position, indicated in dotted linesin Fig. 2, and by reason ofits connection with and effects the backspacing as described in theHolland Patent No. 1,275, 257. referred to above. Upon removal ofpressure from vane 95, spring 101 returns plunger 99, contact 100 andvane 95 to their raised position and effects the opening of the circuitof the electro-magnet' 39, whereupon the armature 40 moves to a positioncorresponding to the full-line position thereof shown in Fig. 2. I

While I have illustrated my invention by showing and describing apreferred embodiment thereof, it is to be understood that suchembodiment is subject to many changes and modifications withoutdeparture from the spirit of the invention and the scope of the appendedclaims.

Having now described my invention, What I claim as new and desire toprotect by 'Letters Patent, is as follows:

1. The combination with a typewriter, of means for controlling anoperation of a phonograph designed to be used in conjunction with thetypewriter, said' means comprising a device having means coactingdirectly with a part of the typewriter and holding said device in such aposition with respect to the typewriter as to render such deviceoperable by the hand of the operator while maintaining thetype-operating fingers of said hand, including the little fingerthereof, in proper touch-operating position over the keys of thetypewriter, substantially as described.

2. .The combination with a typewriter, of electrical means forcontrolling an operation of a phonograph designed to be used inconjunction with the typewriter, said means coinprising a switch devicehaving means coacting directly with a part of the typewriter and holdingthe said device in such a position with respect to the typewriter as torender such device operable by the hand of the operator whilemaintaining the type-operating fingers of said hand, including thelittle linger thereof, in proper touch-operating position over the keysof the typewriter, substantially as described.

3. The combination with a typewriter, of means for controlling anoperation of a phonograph designed to be used in conjunction with thetypewriter, said means comprising a manually operable device havingmeans c0- acting directly with the front member of the typewriter andholding the said device in such a position adjacent and intern'iediatethe ends of said front member as to render such device operable by thehand of the operator while maintaining the fingers of said hand,including the little finger thereof, in proper touch-operating positionover the keys of the typewriter, substantially as described.

4. The combination with a typewriter, of a device comprising separatemeans for re spectively controlling different operations of a phonographdesigned to be used in conjunction with the typewriter, said devicehaving means coacting directly with a part of the typewriter and holdingthe said device in such a position with respect to the typewriter as torender said separate means respectively operable by the hands of theoperator while maintaining the type-operating fingers of said bands,including the little fingers thereof, in proper touch-operating positionover the keys of the typewriter, substantially as described. 7

5. The combination with a typewriter, of a device comprising manuallyoperable members for respectively controlling different op erations of aphonograph designed to be used in conjunction with the typewriter, saidmembers being adjacent to each other, but at different levels, and saiddevice having means coacting directly with a part of the typewriter andholding the said device in such a position with respect to thetypewriter as to render said members respectively operable by the handsof the operator while maintaining the fingers of said hands, includingthe little fingers thereof, in proper touch-operating position over thekeys of the typewriter, substantially. as described.

6. The combination with a typewriter, of a device comprising separateelectrical means for respectively controlling different operations of aphonograph designed to be used in con unct1on w th the typewriter, saidelectrical means having manually operable members, and said devicehaving means coacting directly with a part of the typewriter and holdingsaid device in such a position with respect to the typewriter that saidmanually operable members are located adjacent the front member of thetypewriter and intermediate the ends thereof in a position rendering thesame respectively operable by the hands of the operator whilema-intaining'the type-operating lingers of said hands, including thelittle fingers thereof, in proper touchoperating position over the keysof the typewriter, substantially as described.

7. The combination with a typewriter, a device for controlling anoperation of a phonograph designed to be used in conjunction with thetypewriter, said device having means coacting directly with the frontbar of member of the typewriter and firmly holding the said device insuch a position with respect to the typewriter as to render the deviceoperable by the hand of the operator while maintaining thetype-operating fingers of said hand, including the little fingerthereof, in proper touch-operating position over the keys of thetypewriter, said holding means being yieldably mounted on said device soas to permit the latter to be readily removed from and applied to thetypewriter, substantially as described.

8. A device of the character described comprising a casing containing acontrol device and provided with means whereby said control device maybe actuated from without said casing, said casing being provided with aportion adapted to take beneath the usual front bar of a typewriter andalso having spaced members movably mounted thereon and spring biased touprightpositions, said members being movable from their uprightpositions whereby they are adapted to be disposed beneath said frontbar, and coact directly therewith to hold the said device in such aposition with respect to said front bar as to render such deviceoperable by the hand while maintaining the fingers of said hand inproper touch-operating position over the keys of the typewriter,substantially as described.

This specification signed this 19th day of June, 1925.

, NELSON C. DURAND.

